Patent US2934369A successfully refreshed from Google Patents.
Patent US3916544A successfully refreshed from Google Patents.
US3916544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sidebank excavator with grade and slope control
Assignee: CMI Terex Corp
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Filing: 1973-09-20
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Granted: 1975-11-04
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Expires: 1993-09-20
Abstract
Abstract An improved sidebank excavator for excavatingly removing earth from a hill or a bank-like area, having a horizontal earth removal assembly, a vertical earth removal assembly and a plurality of track members, each track member connected to the excavator support frame via a track support member and a hydraulic cylinder such that the excavator support frame is vertically positionable in an upwardly and a downwardly direction. The hydraulic cylinders are hydraulically interconnected and controlled via a grade and slope control in such a manner that the support frame is vertically positionable about three predetermined control positions, for optimum positionability of the excavator.
Inventors
- 👤 Jr George W Swisher
- 👤 Autho Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:34
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7695; E02F3/80; E02F3/84; E02F3/841; E02F7/00; E02F7/02; E02F9/00; E02F9/02; E02F9/028; Y; Y10; Y10S; Y10S37/00; Y10S37/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
884 words
An excavator comprising: a support frame, having a cutting side, an earth removal side, a forward end and a rearward end; drive means connected to the support frame for supporting the support frame and for moving the support frame in a forward direction and in a rearward direction; earth removal meanS connected to the cutting side of the support frame for excavating earth in the forward direction and in the rearward direction of the support frame; a grade and slope control automatically positioning the support frame and the earth removal means connected thereto in a predetermined slope position relative to a predetermined horizontal plane, comprising: a vertical positioning assembly having a portion thereof connected to a portion of the drive means and another portion thereof connected to the support frame, the vertical positioning assembly raising the support frame in a generally vertically upwardly direction in one actuated position thereof, and lowering the support frame in a generally vertically downwardly direction, in one other actuated position thereof, comprising: first forward hydraulic cylinder means disposed generally near the forward end and generally near the cutting side of the support frame, and being hydraulically connected to raise and to lower the support frame relative to a single predetermined control position, generally near the forward end and generally near the cutting side of the support frame; second forward hydraulic clinder means disposed generally near the forward end and generally near the earth removal side of the support frame; first rearward hydraulic cylinder means disposed generally near the rearward end and generally near the cutting side of the support frame and being hydraulically connected for raising and lowering the support frame relative to a single predetermined control position generally near the rearward end and generally near the cutting side of the support frame; second rearward hydraulic cylinder means disposed generally near the rearward end and generally near the earth removal side of the support frame, the second rearward hydraulic cylinder means connected in hydraulic parallel to the second forward hydraulic cylinder means for raising and lowering the earth removal side of the support frame relative to a single predetermined control position generally near the earth removal side of the support frame and generally between the forward end and the rearward end of the support frame; a power fluid supply hydraulically connected to the first forward hydraulic cylinder means, the second forward hydraulic cylinder means, the first rearward hydraulic cylinder means and the second rearward hydraulic cylinder means supplying actuating power fluid thereto when in communication therewith; and, a grade and slope actuator connected to the vertical positioning assembly actuating the vertical positioning assembly to elevate the support frame in a generally upwardly direction and in a generally downwardly direction, comprising: a first control valve interposed between the first forward hydraulic cylinder means and the power fluid supply, having a first energized position establishing communication between the first forward hydraulic cylinder means and the power fluid supply actuating the first forward hydraulic cylinder means raising the support frame, and a second energized position establishing communication between the first forward hydraulic cylinder means and the power fluid supply actuating the first forward hydraulic cylinder means lowering the support frame; a second control valve interposed between the first rearward hydraulic cylinder means and the power fluid supply, having a first energized position establishing communication between the first rearward hydraulic cylinder means and the power fluid supply actuating the first rearward hydraulic cylinder raising the support frame, and a second energized position establishing communication between the first rearward hydraulic cylinder means and the power fluid supply actuating the first rearward hydraulic cylinder lowering the support frame; a third control valve interposed between the second forward hydraulic cylinder means, the second rearward hydraulic cylinder means and the power fluid supply, having a first energizEd position establishing communication between the second forward hydraulic cylinder means, the second rearward hydraulic cylinder means and the power fluid supply raising the support frame, and a second energized position establishing communication between the second forward hydraulic cylinder means, the second rearward hydraulic cylinder means and the power fluid supply lowering the support frame; an energizing power supply connected to the first control valve, the second control valve, and the third control valve providing energizing power thereto when in communication therewith; a first switch interposed between the first control valve and the energizing power supply, having a disconnect position interrupting communication therebetween, a first position establishing communication therebetween energizing the first control valve to the first energized position thereof, and a second position establishing communication therebetween energizing the first control valve to the second energized position thereof; a second switch interposed between the second control valve and the energizing power supply, having a disconnect position interrupting communication therebetween, a first position establishing communication therebetween energizing the second control valve to the first energized position thereof, and a second position establishing communication therebetween energizing the second control valve to the second energized position thereof; and, a third switch interposed between the third control valve and the energizing power supply, having a disconnect position interrupting communication therebetween, a first position establishing communication therebetwen energizing the third control valve to the first energized position thereof, and a second position establishing communication therebetween energizing the third control valve to the second energized position thereof.
Claim 2
Dependent Claim
884 words
An excavator comprising: a support frame, having a cutting side, an earth removal side, a forward end and a rearward end; drive means connected to the support frame for supporting the support frame and for moving the support frame in a forward direction and in a rearward direction; earth removal meanS connected to the cutting side of the support frame for excavating earth in the forward direction and in the rearward direction of the support frame; a grade and slope control automatically positioning the support frame and the earth removal means connected thereto in a predetermined slope position relative to a predetermined horizontal plane, comprising: a vertical positioning assembly having a portion thereof connected to a portion of the drive means and another portion thereof connected to the support frame, the vertical positioning assembly raising the support frame in a generally vertically upwardly direction in one actuated position thereof, and lowering the support frame in a generally vertically downwardly direction, in one other actuated position thereof, comprising: first forward hydraulic cylinder means disposed generally near the forward end and generally near the cutting side of the support frame, and being hydraulically connected to raise and to lower the support frame relative to a single predetermined control position, generally near the forward end and generally near the cutting side of the support frame; second forward hydraulic clinder means disposed generally near the forward end and generally near the earth removal side of the support frame; first rearward hydraulic cylinder means disposed generally near the rearward end and generally near the cutting side of the support frame and being hydraulically connected for raising and lowering the support frame relative to a single predetermined control position generally near the rearward end and generally near the cutting side of the support frame; second rearward hydraulic cylinder means disposed generally near the rearward end and generally near the earth removal side of the support frame, the second rearward hydraulic cylinder means connected in hydraulic parallel to the second forward hydraulic cylinder means for raising and lowering the earth removal side of the support frame relative to a single predetermined control position generally near the earth removal side of the support frame and generally between the forward end and the rearward end of the support frame; a power fluid supply hydraulically connected to the first forward hydraulic cylinder means, the second forward hydraulic cylinder means, the first rearward hydraulic cylinder means and the second rearward hydraulic cylinder means supplying actuating power fluid thereto when in communication therewith; and, a grade and slope actuator connected to the vertical positioning assembly actuating the vertical positioning assembly to elevate the support frame in a generally upwardly direction and in a generally downwardly direction, comprising: a first control valve interposed between the first forward hydraulic cylinder means and the power fluid supply, having a first energized position establishing communication between the first forward hydraulic cylinder means and the power fluid supply actuating the first forward hydraulic cylinder means raising the support frame, and a second energized position establishing communication between the first forward hydraulic cylinder means and the power fluid supply actuating the first forward hydraulic cylinder means lowering the support frame; a second control valve interposed between the first rearward hydraulic cylinder means and the power fluid supply, having a first energized position establishing communication between the first rearward hydraulic cylinder means and the power fluid supply actuating the first rearward hydraulic cylinder raising the support frame, and a second energized position establishing communication between the first rearward hydraulic cylinder means and the power fluid supply actuating the first rearward hydraulic cylinder lowering the support frame; a third control valve interposed between the second forward hydraulic cylinder means, the second rearward hydraulic cylinder means and the power fluid supply, having a first energizEd position establishing communication between the second forward hydraulic cylinder means, the second rearward hydraulic cylinder means and the power fluid supply raising the support frame, and a second energized position establishing communication between the second forward hydraulic cylinder means, the second rearward hydraulic cylinder means and the power fluid supply lowering the support frame; an energizing power supply connected to the first control valve, the second control valve, and the third control valve providing energizing power thereto when in communication therewith; a first switch interposed between the first control valve and the energizing power supply, having a disconnect position interrupting communication therebetween, a first position establishing communication therebetween energizing the first control valve to the first energized position thereof, and a second position establishing communication therebetween energizing the first control valve to the second energized position thereof; a second switch interposed between the second control valve and the energizing power supply, having a disconnect position interrupting communication therebetween, a first position establishing communication therebetween energizing the second control valve to the first energized position thereof, and a second position establishing communication therebetween energizing the second control valve to the second energized position thereof; and, a third switch interposed between the third control valve and the energizing power supply, having a disconnect position interrupting communication therebetween, a first position establishing communication therebetwen energizing the third control valve to the first energized position thereof, and a second position establishing communication therebetween energizing the third control valve to the second energized position thereof.
Claim 3
Dependent Claim
151 words
The excavator of claim 1 wherein the third switch comprises: a level sensor supported on the support frame sensing the slope position of the support frame, and having an output signal responsive to the sensed slope position of the support frame; a command signal source having an output signal responsive to a preset slope position; a differential amplifier means to receive and compare the output signals from the level sensor and the command signal source, having an output signal responsive to the comparison of the output signals of the level sensor and the command signal source; and, a signal selector having a portion thereof interposed between the energizing power supply and the third control valve, to receive the output signal from the differential amplifier, and to be switchingly positioned in the disconnect position, the first position and the second position, in response to the received output signal of the differential amplifier.
Claim 4
Dependent Claim
302 words
The excavator of claim 2 wherein the earth removal means is characterized as including a vertical earth removal assembly comprising: a forward frame, having an earth engaging face, an upper end, a lower end, a pivot side and a cutting side, the pivot side of the forward frame being pivotally secured to the cutting side of the support frame; a forward digging implement secured to the cutting side of the forward frame, the forward frame and the forward vertical digging implement connected thereto selectively movable to an earth engaging position and to a storage position, the forward vertical digging implement excavatingly engaging a portion of earth generally along a predetermined vertical plane spaced a distance from the cutting side of the support frame in an earth engaging position thereof and in a forward moving direction of the support frame; a rearward frame, having an earth engaging face, an upper end, a lower end, a pivot side and a cutting side, the pivot side of the rearward frame being pivotally secured to the cutting side of the support frame; a rearward vertical digging implement secured To the cutting side of the rearward frame, the rearward frame and the rearward vertical digging implement connected thereto movable to an earth engaging position and to a storage position, the rearward vertical digging implement excavatingly engaging a portion of earth generally along a predetermined vertical plane spaced a distance from the cutting side of the support frame in an earth engaging position thereof and in a rearward moving direction of the support frame; and, positioning means for positioning the forward frame and the forward vertical digging implement in an earth engaging position and a storage position, and for positioning the rearward frame and the rearward vertical digging implement in an earth engaging position and a storage position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |